RU2324118C1 - Heating and ventilation system for inspection channels - Google Patents

Abstract

FIELD: energy; air heaters with forced air circulation.

SUBSTANCE: aim of the invention is to create standardised parameters of air in an inspection channel, simplification of the design of heating system and reduce energy losses. The present task can be solved by installing in the channel, one or more mobile heating units, consisting of axial ventilator and radiator, mounted in series on a platform with rollers, which move on guide rails on the floor of the channels. In this way, air streams are directed either in one direction or towards each other.

EFFECT: obtaining standardised air parameters in an inspection channel; simplification of assembling and operation; reducing energy losses during operation; reduce capital losses when constructing the proposed system.

2 cl, 2 dwg

Description

The invention relates to air heaters with forced air circulation and can be used, for example, for heating inspection ditches.

There are known requirements for the organization of supply and exhaust ventilation with artificial air induction for inspection ditches, requiring daily maintenance and located in rooms where harmful gases are released, vapors with a specific gravity greater than the specific gravity of air (SNiP 2.04.05-91 *. Heating, ventilation and air conditioning. - M.: Ministry of Construction of Russia, 1992. - S.10-14; BCH 01-89. Automobile service enterprises. - M.: Minavtotrans RSFSR, 1990. - Ch. 4).

The closest technical solution to the proposed device is a device for panel heating of inspection ditches with sealing heating pipes into the walls of the ditches, air - with the release of air through holes in the longitudinal walls of the ditches, air-panel - with the release of heated air through metal perforated panels placed on the walls of the ditches (Methodological recommendations for the design of thermal protection, heating and ventilation of buildings of locomotive and car depots. - M .: VNIITS, 1986. - P.29-31).

However, these devices have significant drawbacks: the device requires underground channels of large cross sections, openings in the walls of the channels, which makes it difficult to use it in existing depots, the normalized air temperature is maintained only in the initial zone of the supply pipe or duct, and the normalized air speed is exceeded. For inspection ditches with a large length, for example, for the length of the workshop, organizing the supply of warm fresh air in this way is practically impossible, even with sectional breakdown of the duct due to significant heat losses in the ducts.

The objective of the invention is the creation of standardized parameters of air in the inspection ditch, simplifying the design of the heating system and reducing energy consumption.

This task is achieved in the heating and ventilation system of the inspection ditches, which includes a heating unit, consisting of air channels with air outlet through the holes in the longitudinal walls of the ditches, in that the heating unit consists of an axial fan and air heater, sequentially located on the platform with rollers that move along guides mounted on the floor of the inspection ditch. Several heating units are installed in the inspection ditch, while air flows are directed either in one direction or towards each other.

Figure 1 presents a diagram of the heating and ventilation system of the inspection ditches, which contains the inspection ditch 1, platform 2, fan 3, air heater 4, guides 5.

Figure 2 presents a diagram of a section 1-1 of the heating and ventilation system of the inspection ditches, which additionally contains rollers 6.

The proposed heating and ventilation system operates as follows.

Before starting work in the inspection ditch 1 include a heater 4, and then a fan 3. In this case, the power of the heater 4 is determined by the calculation according to the formula:

Q = LρcA (t _K -t _П ),

where Q is the amount of heat, W;

L - supply air flow, m ³ / h;

ρ is the density of air, kg / m ³ ;

s - specific heat of air, kJ / kg ° C;

A - conversion coefficient kJ / h to W (A = 0.28);

t _K is the air temperature at the outlet of the heater, ° C;

t _P - indoor air temperature, ° C (SNiP 2.04.05-91 *. Heating, ventilation and air conditioning. - M.: Ministry of Construction of Russia, 1992. - P.51).

Using a heater 4 will allow you to adjust the heat consumption depending on the outside temperature of the air and thus get normalized air parameters in the inspection ditch 1.

Depending on the length of the inspection ditch 1, it is possible to install several such mobile heating units, directing, if necessary, air flows either towards each other, or in one direction. The placement of air and heat sources on platform 2 allows you to quickly serve them using the remote control (not shown in the diagram) located on platform 2.

Rollers 6 allow you to easily, without additional mechanisms, move the heating and ventilation system along the guides 5 to the desired place of work.

Thus, the proposed device allows to obtain standardized parameters of the air in the inspection ditch, simplify installation and operation, reduce energy consumption during operation and capital costs during the construction of these systems.

Claims (2)

1. The heating and ventilation system of the inspection ditches, including a heating unit, consisting of air channels with air discharge through openings in the longitudinal walls of the ditches, characterized in that the heating unit consists of an axial fan and air heater, sequentially located on the platform with rollers that move along guides mounted on the floor of the inspection ditch. 2. The system according to claim 1, characterized in that several heating units are installed in the inspection ditch, while air flows are directed either in one direction or towards each other.

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